Donald's two dominant personality traits are his short temper and his positive outlook on life. Many Donald shorts start with Donald in a happy mood, without a care in the world until something comes along and spoils his day. His anger is a great cause of suffering in his life. On multiple occasions, it has caused him to get in over his head and lose competitions. There are times when he fights to keep his temper in check, and he sometimes succeeds in doing so temporarily, but he always returns to his normal angry self in the end.

Donald's aggressive nature has its advantages, however. While at times it is a hindrance, and even a handicap, it has also helped him in times of need. When faced with a threat of some kind, for example, Pete's attempts to intimidate him, he is initially scared, but his fear is replaced by anger. As a result, instead of running away, he fights—with ghosts, sharks, mountain goats, giant kites, and even the forces of nature. And, more often than not, when he fights, he comes out on top.

Donald is something of a prankster, and as a result, he can sometimes come across as a bit of a bully, especially in the way he sometimes treats Chip n' Dale and Huey, Dewey and Louie, his nephews. As the animator Fred Spencer has put it:

The Duck gets a big kick out of imposing on other people or annoying them, but he immediately loses his temper when the tables are turned. In other words, he can dish it out, but he can't take it.[10]

However, with a few exceptions, there is seldom any malice in Donald's pranks. He almost never intends to hurt anyone, and whenever his pranks go too far, he is always very regretful.